ASTM A662 Carbon Steel Flange, Grade C

1,We Manufacturing processes are primarily classified into four types: 1:Forging, 2:Casting, 3:Cutting, 4:Rolling. 2,We can manufacture in accordance with these standards. Standards: GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards). Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others. The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500. Flange Classification 1. **According to Chemical Industry Standards:** Flanges are classified as follows: Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)). 2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows: Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation). 3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows: Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange. 4. **According to Connection Method/Type:** Flanges are classified as follows: Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc. 5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges. 6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges. A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts." -:- For detailed product information, please contact sales. -: ASTM A662 Carbon Steel Flange, Grade C Product Information -:- For detailed product information, please contact sales. -: ASTM A662 Carbon Steel Flange, Grade C Synonyms -:- For detailed product information, please contact sales. -:

ASTM A662 Carbon Steel, Grade C Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: ASTM A662 Grade C Carbon-Manganese-Silicon Steel Plate** **ASTM A662 Grade C** is a medium-strength, fine-grained carbon-manganese-silicon steel plate within the ASTM A662 specification, designed specifically for **welded pressure vessels and critical structures operating at moderate to low temperatures**. It offers a higher minimum yield strength than Grade B, providing an optimal balance of strength, notch toughness, weldability, and cost-effectiveness for demanding industrial applications. The steel is supplied in the **normalized heat treatment condition**, which refines the grain structure to ensure consistent mechanical properties and enhanced impact toughness at sub-zero temperatures. --- ## **International Standard & Key Specifications** * **Primary Standard:** **ASTM A662 / A662M** - Standard Specification for Pressure Vessel Plates, Carbon-Manganese-Silicon Steel, for Moderate and Lower Temperature Service. * **Mandatory Companion Standard:** **ASTM A20/A20M** - Standard Specification for General Requirements for Steel Plates for Pressure Vessels. This governs testing, inspection, tolerances, and certification. * **ASME Code Equivalent:** **SA-662 / SA-662M** in ASME Boiler and Pressure Vessel Code, Section II, Part A. This is the mandatory specification for ASME-stamped pressure equipment fabrication. --- ## **Chemical Composition (Weight %, max unless range is specified)** Composition is per ASTM A662/A662M for Grade C. | Element | Composition (%) | | :--- | :--- | | **Carbon (C)** | 0.10 - 0.20 | | **Manganese (Mn)** | 1.15 - 1.50 | | **Phosphorus (P)** | 0.025 | | **Sulfur (S)** | 0.025 | | **Silicon (Si)** | 0.15 - 0.40 | | **Nickel (Ni)** | 0.40 (optional, for enhanced low-temp toughness) | **Key Notes on Chemistry:** * **Higher Manganese:** The primary difference from Grade B is the elevated manganese content (1.15-1.50% vs. 0.90-1.35%). This increases strength and hardenability, and contributes to improved low-temperature toughness. * **Silicon Content:** The deliberate Si addition provides solid-solution strengthening and improves oxidation resistance. * **Optional Nickel:** Up to 0.40% Ni may be added by agreement to further enhance impact properties for specific low-temperature requirements. --- ## **Typical Physical & Mechanical Properties** Properties are for normalized plates. Minimum mechanical properties are specified by ASTM A662. | Property | Value / Description | | :--- | :--- | | **Tensile Strength** | 450 - 585 MPa (65,300 - 84,900 psi) | | **Yield Strength (min)** | **290 MPa (42,000 psi)** | | **Elongation in 2-in (50 mm) (min)** | 22% | | **Modulus of Elasticity** | ~200 GPa (29 x 10⁶ psi) | | **Poisson's Ratio** | ~0.29 | | **Density** | ~7.85 g/cm³ (0.284 lb/in³) | | **Thermal Conductivity** | ~51.9 W/m·K (at 100°C) | | **Coefficient of Thermal Expansion** | ~11.5 x 10⁻⁶ /K (20-100°C) | | **Charpy V-Notch Impact Toughness** | **Test Temperature:** **-60°C (-75°F)**. **Minimum Avg. for 3 Specimens:** 20 J (15 ft·lbf). | **Critical Distinction from Grade B:** Grade C is designed for service at a **lower temperature (-60°C / -75°F)** while providing a **higher minimum yield strength (290 MPa vs. 240 MPa)**. This makes it suitable for more demanding applications. --- ## **Product Applications** ASTM A662 Grade C is the preferred material for pressure vessels and structural components where a combination of higher strength and reliable performance at lower temperatures is required. **Primary Industries and Equipment:** 1. **Petrochemical & Natural Gas Processing:** * Pressure vessels for gas separation and treatment at low temperatures. * LPG and liquid ammonia storage tanks operating in colder climates. * Scrubbers, knockout drums, and process columns. 2. **Refrigeration & Cryogenic Storage (Moderate Level):** * Tanks for storing liquefied gases like CO2, ethylene, and certain refrigerants. * Vessels in industrial cascade refrigeration systems. 3. **Power Generation:** * Feedwater heaters, moisture separator reheaters (MSRs), and deaerator shells, especially where low ambient design temperatures are a factor. 4. **Offshore & Maritime:** * Process modules and support structures on offshore platforms exposed to cold North Sea or Arctic environments. * Barges and shipboard tanks for certain low-temperature cargoes. 5. **General Heavy Fabrication:** * Mining equipment and structural components for cold-region operations. --- ## **Advantages and Fabrication Considerations** * **Advantages:** * **Superior Strength-Toughness Combination:** Higher yield strength than Grade B, coupled with guaranteed toughness at -60°C. * **Excellent Weldability:** The controlled carbon content and CE (Carbon Equivalent) allow it to be welded using common processes (SMAW, SAW, GMAW) with standard preheat and post-weld heat treatment procedures. * **Cost-Effective Performance:** Provides capabilities approaching those of low-alloy steels at a lower material cost for its designated temperature range. * **Normalized Consistency:** The heat treatment ensures uniform properties throughout the plate thickness and across the production batch. * **Fabrication Considerations:** * **Preheat & Interpass Temperature:** Required for thicker sections to prevent hydrogen-induced cracking (HIC). Specific temperatures should follow applicable codes (e.g., ASME Section VIII, Div. 1). * **Post-Weld Heat Treatment (PWHT):** Often required for pressure vessel fabrications to relieve residual stresses, especially for thicker welds. * **Not for High-Temperature Service:** Like Grade B, it is not recommended for prolonged service above ~425°C (800°F). **In summary, ASTM A662 Grade C is a robust, normalized carbon steel plate engineered to deliver higher strength and reliable low-temperature toughness down to -60°C. It is a fundamental material for engineers designing pressure vessels and structural components for the energy, petrochemical, and processing industries operating in cold environments.** -:- For detailed product information, please contact sales. -: ASTM A662 Carbon Steel, Grade C Specification Dimensions Size： Diameter 20-1000 mm Length <4513 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: ASTM A662 Carbon Steel, Grade C Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A662 Carbon Steel Flange, Grade C -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A662 Carbon Steel Flange, Grade C -:- For detailed product information, please contact sales. -:

Packing of ASTM A662 Carbon Steel Flange, Grade C -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Flange drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 984 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition